i Register
In some senses, sss is marked as slang, US. Watch for register when choosing this word.
intj
The hiss of a snake or other reptile.
"Sss," said the snake.
name
Social Security System.
Selective Service System.
noun
Initialism of super soft source.
Initialism of sick sinus syndrome.
Initialism of subclavian steal syndrome.
Initialism of shit, shower, shave.
Initialism of subsurface scattering.